Defensive publication

ABSTRACT

A SMOKING PRODUCT IS PREPARED BY THERMOFORMING A MIXTURE OF HYDROXYPROPYL CELLULOSE, AN INORGANIC ASHING MATERIAL, AND, OPTIONALLY, AN ORGANIC FILLER. THE HYDROXYPROPYL CELLULOSE CAN BE PLAIN HYDROXYPROPYL CELLULOSE OR A MODIFICATION THEREOF SUCH AS BENZYL-, PHENYLHYDROXYETHYL-, OR HYDROXYBUTYL HYDROXYPROPYL CELLULOSE WHICH WOULD HAVE A LOWER CLOUD POINT AND THUS BE LESS MOISTURE SENSITIVE. OPTIONALLY THE HYDROXYPROPYL CELLULOSE CAN BE FOAMED SLIGHTLY TO MODIFY THE COMBUSTION CHARACTERISTICS THEREOF. THE INORGANIC MATERIAL IS PREFERABLY AN ALKALI OR ALKALINE EARTH METAL COMPOUND IN PARTICULATE FORM FROM ABOUT 25 TO 200 MESH. THE OPTIONAL ORGANIC FILLER IS A PHYSIOLOGICALLY INERT, COMBUSTIBLE MATERIAL WHICH MODIFIES THE COMBUSTION CHARACTERISTICS OF THE HYDROXYPROPYL CELLULOSE.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, S69 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Oflice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED JULY 24, 1973 91:2 O.Gr. 1232 T912,011 SMOKING PRODUCT John A.Harpham, CflllClOft, and Eugene D. Klug, Hillcrest, Del., assignors toHercules Incorporated, Wilmington, Del.

Filed June 30, 1972, Ser. No. 267,801 Int. Cl. A24b 3/00, 3/14 US. Cl.1312 N0 Drawing. 8 Pages Specification A smoking product is prepared bythermoforming a mixture of hydroxypropyl cellulose, an inorganic ashingmaterial, and, optionally, an organic filler. The hydroxypropylcellulose can be plain hydroxpropyl cellulose or a modification thereofsuch as benzyl-, phenylhydroxyethyl-, or hydroxybutyl hydroxypropylcellulose which would have a lower cloud point and thus be less moisturesensitive. Optionally the hydroxypropyl cellulose can be foamed slightlyto modify the combustion characteristics thereof. The inorganic materialis preferably an alkali or alkaline earth metal compound in particulateform from about 25 to 200 mesh. The optional organic filler is aphysiologically inert, combustible material which modifies thecombustion characteristics of the hydroxypropyl cellulose.

